In 2014 a surprising announcement was made that ricocheted around the world - the heirs to the Rockefeller oil fortune would be divesting their entire $860 million dollar philanthropic organization of fossil fuel holdings. The announcement marked a turning point for the divestment movement, which suddenly was catapulted into the mainstream.

During COP21 we caught up with Stephen Heintz, the president of the Rockefeller Brothers Fund to talk to him about the fund's daring decision to divest, and his thoughts on how the movement has been growing ever since.